Card-cylinder-stripping device.



H MCDERMOTT CARD CYUNDER STRIPPING DEVICE.

. AFPLICATFON FAILED QCT.20,19i7. LQEQYJL Patented May 28,1918.

3 SHEETSSHEET 1.

Hy IVICDERIVIOTT.

CARD CYLINDER STRIPPING DEVICE.

APPLICATION FILED 06120. 'I9I7.

Patented May 28, 19.18

3 SHEETS-SHEET 2.

H. McDERMOTT.

CARD CYLINDER STRIPPlNG DEVICE.

APPUCATlON FILED' OCT- 20, I917.

Patented May 28, 1918;

3 SHE TSSH 2 22a cmr HENRY MGDERMOTT, OF CLINTON, MASSACHUSETTS.

CARD-CYLINDER-STRIPPING DEVICE.

Specification of Letters Patent.

Patented May28, 1918.

Application filed October 20, 1917. Serial No. 197,747.

To all whom it may concern:

Be it known that I, HENRY MoDERMor'r, a citizen of the United States, residing at Clinton, in the county of Worcester and State of Massachusetts, have invented a new and useful Card-Cylinder-Stripping Device, of which the following is a specification.

This invention relates to a device for stripping waste from the cylinder of a carding engine. These cylinders are covered with a leather facing known as card clothing which is filled with a great number of fine steel wires or points. During the operation of the machine these points catch and hold the waste and short fibers and require periodic cleaning or stripping, this operation being commonly performed once in three or four hours.

It has been heretofore customary to stop the machine, to then place a detachable stripper roll in operative position, to revolve the cylinder very slowly by hand or by special driving mechanism while the stripper roll is cleaning the cylinder, and to thereafter remove the stripper roll before resuming regular operations. feres with the performance of the regular functions of the machine and causes the production of uneven work, besides materially reducing the total output of the machine.

It is the general object of my invention to provide a stripping mechanism which shall periodically perform the stripping operation without stopping or otherwise interfering with the regular operation of the machine.

Another object of my invention is to provide means for varying the feed to the card ing cylinder during the stripping operation to the end that the load upon the cylinder may be kept substantially constant, thereby insuring uniform'production.

A further object of my invention is to provide mechanism for cleaning the stripper roll after the stripping operation.

With these and other objects in view, my invention in its preferred form contemplates the provision of a normally inoperative stripper roll, a timing device, means controlled thereby for periodically raising said stripper roll into operative position, means to rotate said roll while in operation, a device for cleaning the stripper roll after the stripping operation, and means to rotate the roll in the opposite direction after its return to inoperative position, whereby the cleaning of the roll may be efiected. I also pro This procedure inter-' Figure 1 is an end elevation of my improved stripping mechanism;

Fig. 2 is a detail sectional side elevation taken along the line 22 in Fig. 1;

Fig. 3 is a side elevation of the stripping mechanism;

Fig. 4 is a sectional end elevation taken along the line 4-4 in Fig. 3;

Fig. 5 is a similar view taken along the line 5-5 in Fig. 3;

Fig. 6 is an elevation of a portion of the escapement mechanism;

Fig. 7 is a view similar to Fig. 6, but showing the parts in a different position, and

Fig. 8 is a detail view of certain driving connections.

Referring to the drawings, I have indicated in Fig. 1 a segment of the periphery of a carding cylinder 10 which is to'be cleaned by the stripping mechanism to be described. The stripper roll 11 is provided with shaft extensions 12 and 13 (Fig. 3) rotatably supported in bearing blocks 15 and 16. The blocks 15 and 16 are vertically movable in fixed frames'l7 and 18. The stripper roll normally remains in lowered or inoperative position, but may be moved to operative position by sliding the bearing blocks upwardly in their frames until the teeth of the stripper roll mesh between the teeth of the cylinder 10.

For the purpose of raising and lowering the stripper roll I provide studs 19 and 20, fixed in the lower ends of the sliding bearing blocks 15 and 16, these studs extending into eccentric cam grooves 212l formed in the opposed faces of spur gears 22 and 23 mounted upon studs 24 fixed in the frames 17 and 18 respectively. The gear 22 meshes with a gear 25 (Figs. 1 and 8) fixed to a shaft 26 extending across the machine, and a similar gear 27 fixed at the opposite end of the shaft 26 meshes with the gear 23 which is thereby rotated in unison with the gear 22.

I will now describe the mechanism for W b t periodically rotating the gear 22. This mechanism is actuated from a horizontal shaft 30 (Figs. 1 and 3) which is continuously rotated from any convenient source of power. A vertical shaft 31 is driven from. the shaft 30 through bevel gears 32 and 38 and in turn drives a horizontal shaft 34 (Fig. 3) through bevel gears and 36. The shaft an extends across the machine and is suitably supported in bearings at each side thereof.

A spur gear 37 is fixed to the shaft and is provided with a laterally projecting pin 38 (Fig. l) for a purpose to be described. A mutilated gear to is mounted upon a fixed stud 4:1 in position to mesh with the gear 67. The gear 37 is continuously rotated but the gerr L0 is commonly at rest and post tioned as shown in Fig. 1 with its teeth out of mesh with the gear 37.

A lever as (Figs. 1 and 6) pivoted at l8 to the gear to and is provided with a laterally projecting stud a l normally resting upon the periphery of an escapement disk d5. A spring 46 holds the lever in engagement with the disk and a stop pin 4:7 limits the downward movement of the lever when released. The disk as (Fig. 1) is fixed upon a shaft 50 having one end supported by a bracket 51 and the other end. similarly sup ported at the opposite side of the machine. A worm gear 52 is fixed to the shaft 56 and is engaged by a worm mounted on a vertical shaft 54- which is provided at its upper end with a worm wheel 55 (Fig. 3) driven by a worm 56 on the horizontal driving shaft 30. The worm gear 52 and escapement disk 4:5 are thus driven through two sets of worms and worm wheels and revolve at an extremely slow rate of speed. The parts are so designed that the disk to will make one complete revolution during the desired period intervening between successive stripping operations.

The escapement disk a5 is provided with a notch as. When the disk advances to the position shown in Fig. 6 the stud on the lever 4L2 drops into the notch or and permits the end of the lever 42 to move into the path of the stud 36 on the continuously rotating gear 37. The gear to is thus advanced a sufficient distance to cause the teeth of the gears 37 and ac to mesh with each other, after which the gear ll] performs a complete revolution. The gear 4:0 meshes directly with the gearand is of the same size so the gear 22 also performs a com" plete revolution, as does the gear which rotates in unison therewith. This rotation of the gears 22 and 26 causes the stripper roll to be raised to operative position by the action of the eccentric grooves in the gears 22 and 23, and to be thereafter returned to inoperative position.

order that the gear as may be brought to rest at the end of a single revolution 1 provide a movable member 57 (Figs. 6 and 7) pivoted at 58 to the escapeinent disk as and limited in its movement by stop pins 59 and 60. The member 57 is provided with a head 61 which is adapted to be engaged by the stud ist as the gear 4L0 completes its revolution. The pivoted member 57 by such engagement is moved to the position shown in 7 in which it completes the periphery of the disk 4:5, thus raising the lever 42 out of the path of the stud 38 and rendering the gear 37 inoperative. The parts then remain in inoperative position until the disk 45 has completed its next revolution, and again permits the stud 4A to enter the notch 45 Through the mechanism thus far described, the stripper roll is periodically raised to operative position and returned to inoperative position without requiring any attention or supervision by the operator.

During the stripping operation the waste and short fibe s are removed from the carding cylinder and an increased feed of fiber is necessary to replace the material removed, and thus maintain a substantially constant load upon the cylinder.

In Fig. 2 l have shown a feed shaft 62 rotatably mounted in a fixed frame member 63 and connected to actuate feeding devices not shown. The shaft 62 is normally rotated by a bevel gear 6% driven from any suitable source of power. The gear 645 is loose upon the shaft 62, but is connected therewith by u pawl 65 which engages a ratchet wheel 66 fined to the shaft 62. A sprocket wheel 67 is rotatably mounted upon the hub of the, ratchet wheel 66 and is provided with a pawl 68 also engaging the ratchet wheel 66. The sprocket 67 is driven by a chain 69 from a sprocket 7 0 mounted upon a stud 71 and having fixed thereto a gear 7 2 meshing with the gear 25 previously described. As the stripping mechanism is brought into operative position through the rotation of the gears 22 and 28 the sprocket wheel 7 0 will be caused to rotate the sprocket 67 which, acting through the pawl 66 and ratchet 66, will rotate the shaft 62 independently of the bevel gear ca.

The parts are so proportioned that the rotation when driven by the sprocket chain will be at a speed substantially greater than when driven by the bevel gear ea, thus pro riding an increased feed of fiber to make up for the material removed from the cylinder by the stripper roll. This I consider to be an extremely important feature of my invention as it prevents the formation of thin places in the product during the stripping operation.

T will now describe the mechanism for rotating the stripper roll while in operative position. An internal cone clutch member (Fig. 3) is secured to the shaft extension 13 of the stripper roll 11. The external clutch member 81 is mounted to turn loosely upon the shaft 13 and is continuously rotated by a belt 82 (Fig. 4) driven from any suitable source of power and preferably provided with a tightener or idler pulley, (not shown) which will maintain the tension of the belt as the stripper roll is raised'and lowered.

A gear 83 is fixed to the clutch member 81 and the hub 84 of said clutch member is extended toward the stripper roll and is provided with a circumferential groove 85 (Fig. The upper end of the fixed frame member 18 is extended outwardly and downwardly to form a forked cam plate 86 (Figs. 3 and 4. the forked portions of which extend into the groove 85 in the hub 84: of the clutch member 81. As the stripper roll is raised the forked cam plate 86 forcesthe clutch member 81 outwardly to engage the clutch member 80 and thus rotate the stripper roll 11, preferably at a surface speed slightly exceeding the surface speed of the carding cylinder. As the roll is again lowered the clutch members are separated by the action of the cam plate 86, and the clutch member 81 and carding cylinder 11 become again inoperative.

For cleaning the stripper roll 11 I provide a comb 90 (Fig. l) mounted upon arms 91 secured to a shaft 92 which is vibrated or oscillated by a link 93 connected to the shaft 92 by an arm 94. At its lower end,'the link is connected to a crank pin 95 (Fig. 4;) mounted on the face of a mutilated gear 96 which is positioned to periodically mesh with the teeth of the gear 83 previously described as being fixed to rotate with the clutch member 81.

The escapement mechanism by which the gear 96 is controlled is substantially similar to the escapement mechanism previously described. A pin 97 is fixed in the gear 83 and a lever 98 is pivoted at 99 on the gear 96. A stud 100 on the lever 98 normally rests on the periphery of an escapement disk 101 mounted on a fixed stud 102 and connected to a gear 103 meshing with a gear 10 1 fixed to the shaft 50 on which is mounted the escapement disk 15. As the gears 103 and 104: are of equal size the disk 101 rotates in unison with the disk 45 and the parts are so designed and adjusted that the stud lOOwill fall into the notch 101 of the disk 101 at the same time that the stud 44: enters the notch 15 of the disk 45. The end of the lever 98 is then engaged by the stud 97 and the gear 96 is advanced sufficiently to cause its teeth to mesh with the teeth of the gear 83. The comb 90 is thus vibrated to remove the waste from the stripper roll after the cleaning operation.

As the disk 101 advances the stud 100 on the lever 98 will in time reengage the periphery of the disk 101 and the rotation of thegear 96 will be stopped. It is not neces sary to providev a pivoted member corresponding to the member 57 for the disk 101 as it is not essential or desirableto limit the movement of the gear 96 to a single revolution. The comb thus continues to vibrate for a certain time after the stripper roll has been returned to inoperative position and by such vibration the roll is effectively cleaned.

I will now describe the connections through which the stripper roll is slowly rotated backward when in inoperative position, thus moving its surface past the comb in such a way as to permit the cleaning of the stripper roll after the roll is returned to inoperative position and before the vibration of the comb 90 has ceased.

For this purpose I secure a gear (Fig. 5) to the shaft extension 13 of the roll 11, which gear meshes with a gear 111 when the stripper roll is in lowered or inoperative position. The gear 111 rotates upon a fixed stud 112 and is driven by a. pinion 113 rotatable with a gear 11% mounted on .a short shaft 115 (Fig. 5). The gear 114 is driven by a pinion 116 mounted upon the continuously rotated shaft 3t previously described. The gear 111 is thus continuously rotated ata speed materially less than that of the shaft 34 and the stripper roll is slowly rotated backward through this train of gears whenever it is in inoperative position.

Ifthe carding cylinder is inclosed by an inner-casing 120 (Fig. 1) as is usual, it will be understood that a portion of this inner casing mustbe cut away to permit the operation of the stripping device. A suitable receptacle 121 will also be provided to receive the waste from the comb and stripper roll.

A casing also incloses the lower part of the stripper roll and prevents contact of the roll with the waste after the latter has been removed therefrom.

' The operation of my improved card stripping mechanism has been quite fully described in connection with the detailed description of the machine, but may be briefly summarized as follows:

The escapement disks 15 and 101 are rotated simultaneously at a very slow speed and complete a full revolution at the end of the desired period which intervenes between successive stripping operations. TVhen the revolution of these escapement disks is completed the levers 4.2 and 98 are released and the stripping mechanism is thus placed in operation. The gear 37 is connected through the gear 40 to the gear 22 which acts through its eccentric groove to raise one bearing of the stripper roll, theopposite bearing being simultaneously raised by the cam groove of the gear 23. The stripper roll is thus brought into position to remove the ivastc from the teeth of the driving cylinder 10. As the roll is raised the forked cam plate 86 of the frame 18 causes the clutch members 80 and 81 to engage, thereby rotating the stripper roll. At the same time the gears 83 and 96 are engaged through the release to the lever 98 and" the comb $0 is thus started in operation to clean the stripper roll. Furthermore the rotation of the gear 22 is effective through the gears25 and 72 and the sprockets and 6? to increase the speed of the feed roll shaft 62, thereby maintaining a constant load of fiber upon the carding cylinder.

As the gears etO, 22 and 23 complete their single revolution they are thrown out of operation by the action of the pivoted member 57. These parts come to rest in their original positions. The stripper roll 11 is thereafter rotated slowly in the opposite direction by the engagement of its gear 110 with the gear 111 driven at SlOW speed from the continuously rotated shaft 3% through the chain of gears shown in Fig. 5. The cleaning of the stripper roll is thus accomplished.

The entire operation of the mechanism is automatic, requiring no attention Whatever from the operator and does not interfere with the regular operation of the machine.

Having thus described my invention, it will be evident that changes and modifications can be made therein by those skilled in the art without departingv from the spirit and scope thereof as set forth in the claims and It do not 'WlSll to be otherwise limited to the details herein disclosed, but What I claim is 1. A card cylinder stripping device comprising a normally inoperative stripper roll, devices to periodically move said roll to operative position, escapeinent mechanism controlling said devices, and means to rotate said roll While in operative position.

2. A card cylinder stripping device comprising a normally inoperative stripper roll, devices to periodically move said roll to operative position, means to rotate said roll While in operative position, stool: feeding devices, and means to increase the rate of feed during the stripping operation.

3. A card cylinder stripping device comprising a normally inoperative stripper roll, devices to periodically move said roll to operative position, means to rotate said roll While in operative position, a normally inoperative roll cleaning device, and means to actuate said device for each stripping operation and to continue said actuation for a relatively short period only after such op eration.

4:. A card cylinder stripping device comprising a normally inoperative stripper roll,

devices to periodically move said roll to op- .bearings for said roll, cam mechanism effective to raise said bearingr, actuating devices therefor, and means to periodically connect said actuating devices to said cam mechanism said means including a continuously driven cscapement device.

6. A card cylinder stripping device comprising a normally inope at-ive stripper roll, bearings for said roll, cam mechanism effective to raise said bearings, actuating de vices therefor, and means to periodically connect said actuating devices to said cam mechanism, said means including an escapement dish, a lever controlled thereby, and a member pivoted to said disk and movable by said lever into position to thereafter render said lever and actuating mechanism in operative.

T. A card cylinder stripping device C01l1- prising a normally inoperative stripper roll, bearings for said roll, cam mechanism effective to raise said bearings, actuating devices therefor, and means to periodically connect said actuating devices to said cam mechanism, said means including an escapement disk rotated at extremely slow speed and connections to render said actuating devices operative once in each revolution of said disk Which latter thereby determines the interval between successive stripping operations.

8. A card cylinder stripping device comprising anoi-mally inoperative stripper roll, devices to periodically move said roll to 0perative position, means to rotate said roll While in operative position, a comb to clean said stripper roll, and means to vibrate said comb after said stripper roll has returned to inoperative position.

9. A card cylinder stripping device comprising a normally inoperative stripper roll, devices to periodically. move said roll tooperative position, means to rotate said roll While in operative position, stock feeding devices, means to operate said feeding devices at a predetermined rate, and additional means to operate said feeding devices at a higher rate, said additional means being controlled by the devices which pert odically move the stripper roll to operative position.

in testimony whereof I have hereunto aiiined my signature. 7

HENRY MoDERMO'lT.

Gopie: of this patent may be obtained for five cents eacin by addressing the Commissioner of Patents, Washington, 3. C. 

